<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no,minimal-ui">
  <style>
    body {
      margin: 0;
      padding: 0;
      background: white;
    }

    #myCanvas {
      display: block;
    }
  </style>

</head>
<body>

<canvas width="400" height="300" id="myLove"></canvas>

<script>
  window.requestAnimFrame = (function () {
    return  window.requestAnimationFrame ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.oRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            function (callback) {
              window.setTimeout(callback, 1000 / 60);
            };
  })();

  var FX = {
    config : {
      background	: 'rgba(250,250,250,0.2)',
      color		: 'rgb(250,20,75)',
      highlight	: 'rgb(250,20,20)'
    },
    dots : []
  };

  FX.canvas = document.getElementById('myLove');
  FX.ctx = FX.canvas.getContext('2d');

  Math.TO_RAD = Math.PI/180;

  Math.getDistance = function( x1, y1, x2, y2 ) {

    var 	xs = 0,
            ys = 0;

    xs = x1 - x2;
    ys = y1 - y2;
    xs = xs * xs;
    ys = ys * ys;

    return Math.sqrt( xs + ys );
  };

  Math.getDegree = function( x1, y1, x2, y2 ) {

    var	dx = x2 - x1,
            dy = y2 - y1;

    return Math.atan2(dy,dx) / Math.TO_RAD;
  };

  var Dot = function( opts ) {

    this.color = opts.color;

    this.x = 0;
    this.y = 0;
    this.dest_x = (opts.dest_x - 75);
    this.dest_y = (opts.dest_y - 75);
  };

  Dot.prototype.update = function() {

    var 	d = this,
            dist_x = d.dest_x - d.x,
            dist_y = d.dest_y - d.y;

    d.x += dist_x * 0.05;
    d.y += dist_y * 0.05;

    FX.ctx.fillStyle = d.color;
    FX.ctx.fillRect( d.x-2, d.y-2, 4, 4 );
  };

  FX.setFullscreen = function() {
    FX.width = FX.canvas.width = window.innerWidth;
    FX.height = FX.canvas.height = window.innerHeight;
  };

  FX.handleMouseEvent = function(e, power) {

    var 	radius = 75,
            k = FX.dots.length,
            i=0,
            mx, my,
            dist, degree,
            d;

    if(e.offsetX) {
      mx = e.offsetX;
      my = e.offsetY;
    } else if(e.layerX) {
      mx = e.layerX;
      my = e.layerY;
    }

    mx -= FX.width/2;
    my -= FX.height/2;

    for( ;i<k;i=i+1 ) {

      d = FX.dots[i];

      dist = Math.getDistance( mx, my, d.x, d.y);

      if( dist < radius ) {

        degree = Math.getDegree( d.x, d.y, mx, my );

        d.x += (Math.cos( degree * Math.TO_RAD ) * ((radius-dist) * power));
        d.y += (Math.sin( degree * Math.TO_RAD ) * ((radius-dist) * power));

        d.color = FX.config.highlight;

      } else {
        d.color = FX.config.color;
      }
    }
  };

  FX.createHeart = function() {
    var 	coords = [[1,4],[1,5],[1,6],[1,7],[1,8],[2,3],[2,4],[2,5],[2,6],[2,7],[2,8],[2,9],[3,2],[3,3],[3,4],[3,5],[3,6],[3,7],[3,8],[3,9],[3,10],[4,2],[4,3],[4,4],[4,5],[4,6],[4,7],[4,8],[4,9],[4,10],[4,11],[5,2],[5,3],[5,4],[5,5],[5,6],[5,7],[5,8],[5,9],[5,10],[5,11],[6,2],[6,3],[6,4],[6,5],[6,6],[6,7],[6,8],[6,9],[6,10],[6,11],[6,12],[7,3],[7,4],[7,5],[7,6],[7,7],[7,8],[7,9],[7,10],[7,11],[7,12],[8,3],[8,4],[8,5],[8,6],[8,7],[8,8],[8,9],[8,10],[8,11],[8,12],[8,13],[9,2],[9,3],[9,4],[9,5],[9,6],[9,7],[9,8],[9,9],[9,10],[9,11],[9,12],[10,2],[10,3],[10,4],[10,5],[10,6],[10,7],[10,8],[10,9],[10,10],[10,11],[11,2],[11,3],[11,4],[11,5],[11,6],[11,7],[11,8],[11,9],[11,10],[11,11],[12,2],[12,3],[12,4],[12,5],[12,6],[12,7],[12,8],[12,9],[12,10],[13,3],[13,4],[13,5],[13,6],[13,7],[13,8],[13,9],[14,4],[14,5],[14,6],[14,7],[14,8]],
            k = coords.length,
            raster = 10,
            i = 0;

    for( ;i<k;i=i+1 ) {
      FX.dots.push( new Dot({
        dest_x : coords[i][0] * raster,
        dest_y : coords[i][1] * raster,
        color: FX.config.color
      }) );
    }
  };

  FX.loop = function() {

    var 	ctx = FX.ctx,
            k = FX.dots.length,
            i = 0;

    ctx.fillStyle = FX.config.background;
    ctx.fillRect(0,0, FX.width, FX.height );


    ctx.save();
    ctx.translate( FX.width/2, FX.height/2 );

    for( ;i<k;i=i+1 ) {
      FX.dots[i].update();
    }

    ctx.restore();

    requestAnimFrame( FX.loop );
  };
  window.addEventListener('resize', FX.setFullscreen );
  FX.canvas.addEventListener('mousemove', function(e) { FX.handleMouseEvent(e, -0.1); } );
  FX.canvas.addEventListener('mousedown', function(e) { FX.handleMouseEvent(e, 1); } );
  FX.setFullscreen();
  FX.createHeart();
  FX.loop();
</script>

</body>
</html>